IOS开发--给UIImageView添加touch事件

IOS开发--给UIImageView添加touch事件

分类： IPhone开发中级系列2013-05-29
17:25 942人阅读 评论(1) 收藏 举报UIImageViewtoucheeventIOSAdd Tap gesture

UITapGestureRecognizer

to

myImageView

view
(type of

UIImageView

).

UITapGestureRecognizer *myTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(gestureTapEvent:)];
myImageView.userInteractionEnabled = YES;
[myImageView addGestureRecognizer:myTapGesture];
[myTapGesture release];

Implement

gestureTapEvent:

method
to receive the touch event.

-(void)gestureTapEvent:(UITapGestureRecognizer *)gesture {

UIImageView* myImageView = (UIImageView*)gesture.view ;

}

Then when you implement your

imageViewClicked

method, you can get the tapped ImageView using the

view

property of the GestureRecognizer. Starting from that, you can for example:use the tag of your imageView (if you affected it in your

tableView:cellForRowAtIndexPath:

method) to retrieve the tag and do whatever you want with it (depending on what you affected it to, for example you may have set

imageView.tag = indexPath.row

in

tableView:cellForRowAtIndexPath:

and get that indexPath row back then)
Go thru the superviews of the imageView up to the UITableViewCell, then ask for its indexPath to get it back and do whatever you want with it.
Example:

-(void)imageViewClicked:(UITapGestureRecognizer*)gestRecognizer
{
UIImageView* iv = (UIImageView*)gestRecognizer.view;
NSInteger tag = iv.tag; // then do what you want with this

// or get the cell by going up thru the superviews until you find it
UIView* cellView = iv;
while(cellView && ![cellView isKindOfClass:[UITableViewCell class]])
cellView = cellView.superview; // go up until you find a cell

// Then get its indexPath
UITableViewCell* cell = (UITableViewCell*)cellView;
NSIndexPath* indexPath = [self.tableView indexPathForCell:cell];
}